If 250 g of calcium chlorate decomposes into calcium chloride and oxygen what mass of oxygen would be produced

Which statement describes james chadwick’s discovery.

Drug abuse will not lead to physical and psychological dependence. true or false ?

The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.